Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd146a545683f17d…

MALICIOUS

PDF

58.9 KB Created: 2020-10-30 10:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ec8aeb5ab709f7d3b9f595fe61648711 SHA-1: 246cb07303d6db71cf3697f67f8352b1c84a6444 SHA-256: bd146a545683f17d8316f60894345befb15c07912433d4697e6b95b6eb33e154
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/pify?keyword=royal+marine+basic+training+length In PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/954539.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374532/normal_5f8f385b82822.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovitiku/zununejiwezubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f87f9e7-09f4-42b1-b1df-330591febf88/11635664436.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/ibps_po_2019_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/definitions_of_accounting_terms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987b9700-e19f-406f-b14b-8be428244368/3ds_xl_charger_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791b6be0-295c-48dc-8b37-16ed23c925f2/kavovozovikobafasamaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2ee818-82a7-4510-8c2b-0dde123da329/gupefiz.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/macbeth_act_2_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/nixuwifanojumopivogitet.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/automation_test_plan.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7A0 5464 bytes
SHA-256: ed8f57bcd10aceb7c077cce8cf399010df8931d9277c27670971cd9c26c92fae
font_01_sfnt_off0000ba13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA13 10720 bytes
SHA-256: c20ef84e8f18fb5008a619d70be311dbc9ae8ca19c0d66044786927c45fca5f8